Suppression effectiveness research on multi-level EMI filter in thermal electromagnetic interactive filed of explosion-proof three-level NPC converter

摘要

DC power supply for its biasing and it is possible to construct the active filter independent of the source voltage of the equipment. In Ref. [5], the design and performance of a passive EMI filter for a voltage-source PWM inverter with sinusoidal output voltage and zero common-mode voltage were researched, and the purpose of the filter is to eliminate both high-frequency common- mode and normal-mode voltages from the three-phase output voltages of the inverter.